Work

Dual-Laguerre Gaussian pseudo-Schell model beams

Year: 2025

Type: article

Abstract: We introduce a novel class of pseudo-Schell model (PSM) sources featuring a Dual-Laguerre Gaussian (DLG) spectral degree of coherence. These sources exhibit perfect coherence for co-radial points while achieving tunable partially coherence between points at different radial distances via DLG parameter modulation. The light fields radiated from such sources, characterized by an initial Gaussian intensity profile and DLG coherence, exhibit a remarkable self-focusing effect with adjustable focal length and peak intensity controlled by Laguerre polynomial mode order, coherence length, and other source parameters. Furthermore, we demonstrate DLG-PSM vortex beams carrying arbitrary topological charges, which maintain stable annular profile with persistent null central intensity while offering flexible control over self-focusing behavior during propagation. This unique combination of features opens new possibilities for vortex beam applications in specific scenarios.

Source: Optics Express

DOI: 10.1364/oe.575527

Authors: Zhangrong Mei, Jingnan Yang, Bingsong Cao, Yonghua Mao

Institutions: Zhejiang A & F University, Huzhou Normal University

Language: English

Topic: Orbital Angular Momentum in Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: National Natural Science Foundation of China, Natural Science Foundation of Zhejiang Province